comfort: very comfortable for a newborn. The heaviest child i've tried to wear in it was 9kg (at 11months old), and by that point it was no longer enjoyable - and she would have easily been able to throw herself out. But for a newborn (or a toddler that's used to being in it) its very safe and absolutely no pain. i've worn her for 4-5hours+ without any issues.
ease: I find it really easy to put on, but it took some practice. its certainly not the most difficult carrier out there, but definitely practice at home a few times before trying in public.I actually practiced with our dolls, before i tried with a child - just to be on the safe side.
durability: very durable, had mine 2+ years as there's no real discoloration and no damage. I don't leave it near the toddler though ;-)
cleaning: chuck in the machine and then stick it in the sun? easy peasy - and since its just one length of fabric, it dries very quickly.
lightweight: very light, and quite compact (although i have a really long one - about 6m,built for someone many many sizes larger than i am - so i assume it would be even more compact and light if i had the right size).
$$: i bought mine off ebay for about $80-but all things considered, it was definitely worth it - and i'm looking at buying far more expensive ones (that do basically the same thing) so its definitely one of the cheaper wraps on the market.